Machine



(NoModel.) 5 Sheets-Sheet l.

C. GfHILL.

SPRING MAKING MAGEINE. No. 400,340.v Patentedlvrar. 26, 1889'.

as@ E N4 PETERS, Phowulhugnpher. washington. D. C

(Nc Model.) 5 sheets-sheet 2.

C. C'. HILL.

SPRING MAKING MACHINE. No. 400,340. Patented Mar. 20, 1880.

"mi mi?" flA N. PHERS, Phowulhugrnphur. washington D. C.

5 Sheets-Sheet 3.

(No Modl.)

` l C. G. HILL. SPRING MAKING MACHINE.

No. 400,340. Patented Mar. 26, 1889..

/IAI

i WI I Q. m w.

a Pnnmmhngnjyer. wuhingm, n, c.

(No M0001.) 5 sheets-sheet 4.

0. C. HILL.

SPRING MAKING MACHINE. No. 400,340. Patented MM.` 20, 1880.

u mi

I"umnmummmmnunnlmunnlll H III! w |1001rmluummmmamIwwwm00mmm|00 *i @l I IIIIIHHIIIIIIIIIIlllllllllliiiiii IMMO HWUHIIIIIIMWIIIWII ff"HIIUIliM1Illllllli!IlIlIlIlIIIIIlIlIl!!lillI!Ilmi!"IIIIIlIIIMIMIIHIIIIIINHHUHIIIIH (No Model.) 5 sheets-sheet 5;

C. 0. HILL. SPRING MAKING MAGHINB. No. 400,340. Patented Mar. 26, 1889.

N. PETERS, Phdlv-Ullwgmphenyllihingwn D (L UNITED STATES PATENT OFFICE.

CHRISTIAN C. HILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHARLES L. AMES AND ABEL H. FROST, OF SAME PLACE SPRING-MAKING MACHINE;

srnoIFIcAIoN forming part of Letters Patent No. 400,340, dated March 26, ieee; Application fildIuly 5, 4i888. Serial Ifo; 279,001. (No modeh) To @ZZ whom it mail concern:

Be it known that 1, CHRISTIAN C. HILL, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Spring Making Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to a novel machine for the purpose of making spirallycoiled wire sj; rlngs of co Ie shape, such as are usel for spring-beds and in upholstering.

The invention consists in the matters shown and described hereinafter, and pointed outin the appended claims.

In the accompanying drawings, illustrating my invention, Figure l is a side elevation of a machine embodying my invention as seen from that side of the machine at which the finished springs are discharged. Fig. 2 is an end elevation of the same. Fig. 3 is a central vertical section of the same, taken upon line 3 3 of Fig. 1. Fig. 4 is a vertical section taken upon line 4 4of Fig. 1. Fig. 5 is a side elevation illustrating that side of the machine opposite to that shown in Fig.A 1. Fig. 6 is a detail sectional elevation taken upon line 6 6 of Figs. 1 and 5. Fig. 7 is an enlarged detail section through the formingmandrel, taken upon line 7 7 of Fig. 4. Fig. Sis adetail section taken upon line 8 8 of Fig. 1. Fig. 9 is a section taken upon line 9 9 of Fig. 8. Fig. 10 is a sectional plan view taken upon line 10 10 of Figs. 1 and 5. Fig. 11 is an enlarged detail section taken upon line 11 11 of Fig. 6. Fig. 12 is a detail section taken upon line 12 12 of Fig. 1l. Fig. 13 is a detail section taken upon line 13 13 of Fig. 11. Fig. 14 is a detail section taken upon line 14 14 of Fig. 11. Fig. 15 is a detail section taken upon line 15 15 of Fig. 11.

As illustrated in the said drawings, the main frame of the Inachine consists of two parallel vertical frame-plates, A A, and an arched girt or connecting plate, A', which is bolted to the top of the frame-plates A A, said plate A' being provided at its opposite ends with horizontal arms A2 A2, which extend beyond or outside of the platesAA, and are provided at their ends with bearings a a for the main or mandrel shafts of the machine. At their lower parts the frame-plates are connected by 5 5 two parallel girts or frame pieces, A3 A3, herein shown as cast in one piece.

B B' indicate the mandrel-shafts, which are mounted to both rotate and slide longitudinally in the 4frame of the machine. Said 6o shafts are supported at their outer ends in the bearing o a of the frame-arms A2 A2, while their inner ends are supported by engagement with revolving sleeves B2 B2, which sleeves are sustained in bearings a' o', lo- 65 cated, in the instance illustrated, at the upper ends of the frame-plates A, the top frame plate or girt, A', being conveniently constructed to form the tops or upperparts of said bearings, as clearly shown in Fig. 5. Secured to said 7o sleeves B2 B2 are gear-Wheels B3 B2, by means of which rotary motion is transmitted to the said sleeves, said gear-wheels being driven in a manner hereinafter described. The said shafts B B' are provided with longitudinal 75 grooves b b, which engage splines b' in the sleeves B2, so that rotary motion maybe transmitted from the sleeves to the shafts, While at the same time the shafts may be moved freely endwise through the sleeves.v 8o

C C' are two forming-mandrels, which are mounted upon the inner or adjacent ends of the shafts B B', and upon or about which the wire is wrapped 0r Wound to give shape to the springs. The said Inandrels are tapered from their outer ends inwardly, or, in other words, are made largest at their ends which are att-ached to the shafts B B' and smallest at their ends which are adjacent to each other. Then the maudrels are in position for the 9o wrapping or winding of the Wire thereon, their adjacent ends are brought into close contact with each other, as shown in Fig. 1, so that the two mandrels form a double cone having the shape of a conical wire spring as 9 5 usually made. In the surfaces of the said mandrels are formed spiral grooves c o', within which the wireis laid in wrapping it about the mandrels, said grooves being arranged to form a continuous spiral when the mandrels Ioo are brought together end to end in the manner above described. The mandrels are made movable toward and from each other for the purpose of enabling the finished spring to be discharged therefrom, the endwise movement of the mandrel being accomplished by thrusting the shafts B B, to which said mandrels are attached outwardly, the said shafts having endwise movement in their bearings in the manner above described for this purpose. The wire is wrapped about the mandrel by giving rotary motion to the latter, the wire being fed to the mandrels by means of a movable guide which swings in a vertical plane and in an are approximately correspending with the curvature of the conical surfaces of the mandrels, and which is moved longitudinally of the mandrel at such speed that the wire will pass straight from the said guide to the groove of the mandrel as the latter rotated, thereby enabling the wire to be laid smoothly within the groove in the formation of the spring.

The devices employed in the machine shown for giving longitudinal motion to the mandrel-supporting shafts l and B will now be described.

D is the main or cam shaft of the machine. Said shaft is mounted in bearings a2 a'zin the frame-plates A below and parallel with the mandrel-shafts B and 13. At one end of the machine, outside of the frame-plates A, said shaft D is provided with a heavy drive-wheel, D. The shaft D is driven from a countershaft, E, by means of a pinion, E, intermeshing with the wheel D. rlhe counter-shaft E has bearin at a3 a upon the frame-plates A, and is provided with fast and loose belt-pulleys E2 E, over which is placed the drivingbelt for giving motion to the machine. For giving longitudinal movement to the mandrei-shafts l and B the shaft D is provided with two cams, D2 D3, arranged to act upon vertically-arranged levers F F, which levers are pivoted at their ends by means of pivots f f to the longitudinal girts A31-Xi", and are forked at their upper ends and engaged with pins f2 f3, affixed in rings or sleeves fji", which rings or sleeves are mounted upon the shafts B and B adjacent to the mandrels. Said sleeves f* f5, as more clearly shown in Fig. 7,arc held from endwise movement upon the shafts B and B', while said shafts are adapted to turn freely .within the collars, thereby enabling the shafts to be moved endwise by the action of the levers F and F when the latter are shifted by means of cams D2 D3.

lin the particular construction illustrated the collar f4 is held between. a ring, lf2, secured to the shaft B, and a iiat plate, l", mounted uponA the said shaft in contact with the mandrel C. Said plate B4 is provided with a series of pins, b:g h3, arranged around the mandrel C, parallel with the same, for the purpose of partially confining the loose end ot' the spring at the moment the same is severed from the blank-Wire, as hereinafter fully set forth. Said plate B4 is held from turning with the shaft and mandrel by means of a pin, h4, in the plate, which is engaged with two pins, f f6, in the upper end of the lever F. The sleeve is held from endwise movement upon the shaft B by being confined between a ring, h5, secured to the shaft, and the adjacent end of the mandrel C', against which the said sleeve bears.

The levers F F are desirably made duplex or in two integral parts, arranged to pass at opposite sides of the shaft D, the lower ends of the parts of said levers being connected by horizontal cross-pieces F2 F, upon which are mounted anti-friction rollers FL F4, which engage the cams D2 Said cams, as shown, consist of flat plates or disks, against which the rollers Fl F'l rest during the greater part of the revolution of the shaft, the faces of the cams against which the rollers act being arranged to hold the upper ends of said levers F F at the inward limit of their throw and thereby retain the man drels C and C in coutact with each other during the winding of the spring. In the said cams and extending through somewhat less than a fourth of the circumference of the same are provided pcripheral cam-grooves, formed in the particular instance illustrated by cutting away part of the periphery of the cam and bolting to each of the said disks two cam-plates, d d', having adjacent curved surfaces forniing opposite walls of the cam-grooves. Said plates are so shaped as to swing or carry the :rollers F'1 outwardly, thereby moving the upper ends of the levers F and F away from each other and separating the mandrels C and C to allow the discharge of the finished springs.

Intermittent rotary motion is given to the mandrel-shafts B and B by means as follows: Upon the shaft D, at the opposite end of the machine, exteripr to the frame-plates A A, are located mutilated gear-wheels G G, said gearwheels having gear-teeth q, extending partially around the same, and intermediate smooth surfaces, g g. In their parts adjacent to the smooth surfaces g g are located bearing-flanges g2 gf", the external faces of which are smooth an d cylindric.

ll Il are short hollow shafts mounted upon bearing-studs h 71,, secured in the frame-plates A, adjacent to the gear-wheels G and G and near the shafts B and B. Said shafts Il l1 are provided with gear-pinions II2 H2, adapted to intermcsh with the gear-teeth g g of the gear-wheels G G. Said shafts are also provided with gear-pinions H3 H3, intermeshing with the gear-wheels l Bil, which are attached to the sleeves B2 ,132, surrounding the said shafts B 3. To the pinions ll2 are secured flat bearing-plates ll ll, the edges of which are constructed to lit and ride upon the bearing-flanges (2 g2. The mutilated gears G and l', together with thepinions H2 H2, interm eshing therewith and provided with plates llA1 ll1 in the manner described, afford a means of IOO IIO

giving intermittent rotary motion to the shafts B and B in a manner heretofore well known and readily understood. The periods of rest and mot-ion in the said shafts B and B are so timed that the said mandrel-shafts will be' rotated during the time the mandrels are in contact with each other, but will be held from rotation while the mandrels are being separated and brought together, inthe manner hereinbefore described. The bearing-studs 7L and 7L are herein shown as secured in slots at* al in the framelplates A A, to allow the gearpinions H3 H8 to be moved toward and from the gear-pinions B3 B3.

The devices for guiding. the wire tothe mandrels in the act of .forming the springs are constructed as follows: I is an oscillating arm which carries at its lower end the guiding devices for the wire, made as hereinafter described. Said arm is mounted upon a hollow shaft or sleeve, I, having bearings in a bracket, I2, which is attached by means of bolts 'L' i to a vertical arm, A4, which eX- tends upwardly from the top of the framegirt A. The said hollow shaft or sleeve I is arranged transversely of the mandrel-shafts B B at the top of the machine and over the mandrels C C. The lower end of the arm I is arranged to swing in a horizontal plane at one side of the central vertical plane of the machine, the lower or free end of the arm being horizontally opposite the mandrels when the latter are in contact with each other. Said sleeve I is extended somewhat past the bearing t" in the bracket I2, and upon the said sleeve is secured a collar, 2, Figs. 3 and 4, which holds the sleeve from moving endwise in the bearing. At its lower or free end the arm I is provided with a wireguide, I3, consisting of a central apertured plug held in a socket, t3, in the lower end of the arm and secured in said socket by a set-screw, 4, Figs. l2 and 13. The wireguide I3 is arranged horizontally at the side of the arm adjacent to the mandrel, and its guide-aperture is approximately tangential to the conical surfaces of the mandrels in all positions of the carrying-arm I. Said guide thus serves to give proper direction to the wire as it passes from the arm toward the said mandrel.

I4 is a tension device attached to the lower end of the arm I exterior to the wire-guide, said tension device being intended for giving the necessary tension to' the wire as the latter is drawn through the guide in the rotation of the forming-mandrels. Said tensin device consists, as herein shown, Figs. 5, l2, and 13, of two plates, I5 I, provided with opposing grooves t, which together form the aperture through which the wire passes. Said plates I5 I are supported upon an arm or bracket, I7, attached to the lower end of the arm I by means of bolts i t6, which pass through said plates I5 Ii and are secured in the said arm I7. Around the said bolts t i, between the heads thereof and the plate I, are placed coiled springs 717; Said springs serve to press the said plates toward each other and to thereby clamp the wire with a greater or less pressure, according to the tension of the springs. By turning the bolts t i6 the teni sion of the said springs may be obviously .inl creased or, decreased, as desired.

As hereinbefore stated; the arln I, together with the wire guide and tension device thereon, is moved ,or swung lengthwise of the mandrels C and C during the rotation of said mandrels, so that the wire shall be fed smoothly and evenly to the grooves c c in the winding of the spring. The devices illustrated in the accompanying' drawings for giving oscillatory motion to the said arm I are as follows:

J, which extends transversely of the machine beneath the shaft D, and is pivoted at the side of the machine to abracket, J 2, which bracket is bolted to one of the longitudinal frame-girts, A3, and is provided with a bearing, j, for the drive-shaft E. The lever J is provided with a pin or stud, j', carrying an anti-friction roller, 3'2, which engages the periphery of a cam, J 3, mounted upon the shaft D. Said cam acts to depress the free end of the lever J thereby swinging the free end of lOO the arm I lengthwise of the forming-mandrels C and C. The roller jz'is arranged to press upwardly against the surface of the cam J3, so that said cam gives the downward movement only to the arm J the return movement of the arm I (acting to lift said arm J being produced by means of a spiral spring, J 4, connected at its upper endwith an arm, I9, attached to the guide-carrying arm I and at its lower end to the frame. Said lower end of the spring is herein shown as attached to the frame-plate A by means of a ho'ok, je', bolted to the frame-plate in the manner illustrated. The arms Is and I9 extend outwardly from the guide-carrying arm I in opposite directions, so that a downward pull upon the outer end of the arm I8 moves the wire-guide in one direction, while the action of the spring, which pulls downward upon the arm I, serves to swing said guide in the opposite direction.

In the operation of the parts above described the arm I, carrying the wire-guide, begins its movement longitudinally of the mandrels at the same time that the latter begin to turn for winding the wire upon the same, and the speed of the end of said 4arm I and wire-guide carried thereby is so regulated with reference to the spiral curvature of the grooves c c that said guide follows the said grooves c c as the mandrel is rotated, thus causing the wire to be laid smoothly within said grooves, the wire being held taut by the IIO tension device l", so that it is drawn and held. tightly within the grooves and thus accurately given the form of the mandrel.

The mandrel is provided with a gripping device adapted to grasp or seize the end of the wir'e previous to the winding operation, and, in connection with such gripping device, an automatic feeding apparatus is provided for` automatically thrusting forward the end of the wire into the gripping device before the beginning of each rotary movement of the "mandrels by which a spring is formed. The said devices for feeding forward the wire are constructed as follows:

K K, Figs. il, 5, il, 11, 12, 13, 1i, and 15, are two parallel shafts mounted upon the arm I and provided at their lower ends with two grooved wheels, 7.3 7s', (shown more clearly in Figs. 11 and 12,) the contact-points of which are arranged in alignment with the path of the wire through the guide 13 and tension device I", so that when said wheels are brought together they will engage said wire. Said wheels 7.y 7s are located between the said tension device and the guide 13, so that when they are in operation they will act to draw the wire through the tension device and force it forward through the guide, which latter is provided with a guide-aperture of such size as to allow the free passage of t-he wire through it.

The shaft K is mounted in bearings S i", Figs. 5, 1l, and 15, herein shown as formed by lugs cast upon the outerl face of the arm I, and said shaft K is provided with a gearwheel, 7a2, intermeshing with a gear-wheel, 7c3, of the same size, upon the shaft K. Said shaft K is mounted in an eccentric bearingaperture, 7a4, formed in a cylindric plug, K2, Figs. 11, 13, and 15, which plug is mounted in an elongated bearing, im, cast upon the arm I, at one side of and adjacent to the bearing is, the plug K2 being arranged to turn about an axis parallel with the shaft K. The purpose of mounting the shaft K eccentrically in the plug K'l is to enable the said shaft K to be shifted bodily toward the shaft K, this movement of the shaft K being accomplished by giving a partial rotation to the said plug. The shaft K is made movable toward and from the shaft K for the purpose of enabling the rollers 7;, and 7s. to be brought together to grip and feed forward the wire prior to the beginning of the winding of the same upon the mandrel, the said rollers being released from the wire, (after the same has been fed forward a considerable distance to engage the gripping devices of the mandrel C,),so as to enable the said wire to be drawn freely past said rollers as the mandi-els are turned for winding the wire thereon.

The devices illustrated for giving partial rotary movement to the plug K2 will be hereinafter described.

The means employed for turning the said rollers 7a 7a to feed forward the wire are as follows: The shaft K, supporting one, 71;, of

said rollers, is arranged radially with refer'- ence to the supporting-shaft l of the arm l, and said shaft I is provided upon its end, above the bear-in g i and adjacent to said hollow shaft 1, with a beveled gear-pinion, 7a", which. intermeshes with a beveled gear-wheel, 756, mounted upon a shaft, Ki", which passes axially through and has bearing in the hollow shaft l, as clearly shown in Fig; The

shaft K and rollers 7i: 7a are driven, at required intervals, by means applied torotatc the said shaft K, the rotation of said shaft being transmitted to the shaft K and from said shaft Kto the shaft K by means of gear-wheels 7c3 7a3,

For giving rotary movement to the said shaft K3 for the purpose described, devices are provided which are more clearly shown in Figs. 1, 3, and i.

K'l is a ratchet-wheel, attached to the end of the shaft K, which protrudes from the hollow shaft l', and K5 is an oscillating arm, which is pivotally supported upon said shaft K, and is provided with a spring-pawl, 7u?, engaging the ratchet-wheel K". The free end of the oscillating arm K5 is connected, by means of a horizontal]y-arranged connectingrod, 7c, with a vertically-arranged lever, K, pivoted between its ends, by means of a pivotpin, 7.a, to one of the frame-plates A. Said lever K is provided at its lower end with an anti-:friction roller, 71110, adapted to act against a cam projection, K7, upon the inner face of the gear-wheel G, Figs. 1 and Ll, the said roller kw being held in contact with the cam-plate KT by means of a spring, K, attached to the lever KG and to the machine-frame. In the operation of these parts an oscillatory movement is given to the lever Ks and to the oscillating arm K5 once during each rotation of the gear-wheel G, so that the shaft KJ is given a partial rotation and the feed-rollers 7i: 7a thereby turned to carry forward the wire once during each rotation of the shaft D, by which. the several movements of the machine necessary to make a single spring are accomplished. The cam-plate K7 is so located upon the wheel G that this movement of the parts for feeding .forward the wire occurs before the rotation of the mandrels C and C begins, and while the said mandrels are approaching each other after having been separated to allow the discharge of the finished spring therefrom.

The means illustrated for th rowing together the rollers 7i: 7.1 for the purpose of gripping the wire at the time said rollers are turned for feeding forward said vwire are made as follows:

L, Figs. 5, i3, and 1l, is an arm attached to the upper end of the cylindric plug K2, and adapted to partially turn said plug when the arm oscillated.

L L2 are two toggle-links connected wit-h each other by a central pivot, 7, the said toggle-links being pivoted at their outer ends, one, L', to the arm L, and the other, L2, to a rigid arm, 110, extending outwardly at one side IOO IIO

of the arm I. The said toggle-links L L2 are provided at their inner faces, adjacent to the pivot Z, with shoulders Z Z2, adapted to come together and limit the iiexure of the togglelinks when the latter stand at about right angles with cach other, as illustrated in Fig. 14. The link L2 is extended past the pivot Z2, so as to form an arm, Z2, which reaches inwardly toward the frame-plate A. To the end of said arm Z5 remote from the pivot Z3 is attached one end of a coiled spring, L2, the opposite end of which springI is attached to the pivot Z4, which connects the link L with the arm L. Said spring, when thus arranged, tends to hold the toggle-links in their flexed position and with the shoulders Z Z2 in contact with each other, as clearly shown in Fig. l-l. When the said links are iiexed and the spring contracted, as shown in full lines in Fig. 14, the free end of the arm L is thrown inwardly and the plug' K2 rotated in such position that the rollers Zt Z0 are in contact withv the wire. When, however, the said toggle-links are straightened out and the spring expanded, the arm L is thrust outwardly and the plug K2 brought to a position in which the roller Zt is free from the roller lc. The said toggle-links L L2 are thrust into their flexed position by contact of the projecting end Z5 of the link L2 with a spring-detent, L, Figs. 5, 3, and 6, which is attached to the frame-plate A in the path of the said part Z5 of the arm as the oscillating arm I is moved. The said links are straightened out for the purpose of causing the feedrollers to release the wire by the action of a stationary arm, L5, upon the advance edge of one of the toggle-links (in the construction illustrated the toggle-link L) of an arm, L5, attached to an adjacent part of the machine, the pressure of said arm L5 against the toggle-link, as the wire-guide carrier is moved bodily toward the said arm, acting to press the central joint of the toggles backwardly,

, and thus expand the spring L3 and straighten out the toggle-links. The spring-detent L4 is constructed to act only as the carrier-arm I moves backwardly or returns to its startingpoint opposite the larger end of the mandrel C', said detent being provided with an inclined face or surface for engagement with the rear edge of the link L2, whereby the detent will be pushed outwardly to allow the passage of the link in the succeeding forward movement of the said carrier-arm. Said detent L4 is arranged in such position that it will flex the toggle-joint, and thereby bring the feeding-rollers into contact with the wire during the backward stroke or movement of the wire-guide carrier, so that the wire will be fed forward toward the mandrel during the latter part of the return stroke or movement of said carrier.

The arm L5 is located in such position that it will engage the toggle-links and straighten said toggle-links to release the wire at the termination of the backward movement of the said carrier, said arms being so arranged that the links will be brought into alignment with each other at the moment that the movement of said carrier ceases.

.In the particular construction illustrated the arm L5 is attached to the lever F, by which endwise movement is given to the shaft B and mandrel C. Said arm L5 is swung or moved with the said lever F and is thus brought into position for contact with the toggle-links L and L2 at the termination of the forward movement of the mandrel C', the parts being so arranged that the said toggle-links are straightened out by the pressure of said arm L5 at the moment the said mandrels are brought together and are in position for the winding and wrapping of the wire about them. The movement of the said carrier is so timed that the wire-guide is brought into its normal position or in position to move the wire forward to the gripping-jaws while the mandrels vare separated, the wire being fed forward while the mandrel is advancing, so that the end of the wire will extend across or over the mandrel in position to be engaged with the jaws of the gripping device as the mandrel advances. The said arm L5 being moved with the mandrel, said arm willact upon the toggle-links L L2 to straighten out the latter, and thereby release the feed-rollers from the wire, at the moment said mandrel C terminates its forward movement and comes into contact with the mandrel C. Said gripping device upon the mandrel C, by which the end of the wire is gripped and held during the rotation of the mandrel, is more clearly shown in Figs. 7 and 13, and is constructed as follows:

M is the stationary jaw of the gripping device. Said jaw is arranged horizontally in such manner as to overhang the larger part or base of the mandrel, and is attached to and supported by a radially-arranged plate, M rigidly secured to the base of the mandrel in the manner clearly shown in Fig. 7.

M2 is the movable jaw of the gripper, which is formed upon the end of a sliding ban'm, located in an oblique guide-aperture, c2, within the mandrel C. The guide-aperture c2 Vat its inner end intersects a centrally-arranged axial aperture, C2, which extends into the mandrel from the smaller end thereof. Vithin said passage C2 is located a sliding block, M2, having an inclined or oblique end surface, m, against which bears the in ner end of the sliding bar fm, the longitudinal movement of the block M3 being limited by means of a pin, m2, which enters a slot, m2, in the said block M2. The sliding rod m is held at the inward limit of its movement, so as to retain the jaw M2 separate from the jaw M, by means of a coiled spring, M4, located within the mandrel and acting upon the said rod m.

ln the particular construction herein shown the spring M4 is located inan oblique passage, 02, bored into the body of the mandrel from the seat of the plate h and is adapted to bear against the end surface of a V-shaped IOO IIO

notch iin the side of the rod nl, the sla-.ing being held in place on the said plate by pressing at its outer end against the plate M. The pressure of the spring M", acting to throw the rod fra inwardly, also operates to thrust and hold the sliding block M" at the outward limit of its movement, owing to the pressure of the said rod on, against the inclined or oblique Arear surface et' t-hesaid block M. The movable gripping-j aw M2 is actuated to grasp the wire by means oi.' a project-ion upon the mandrel C, arranged to come in contact with the sliding block M, and to thereby thrust said block inwardly and torce the rod m upwardly or outwardly against. the action ot the sprinff Ml.

In tne particular construction of the parts herein illustrated the shat't B is extended nearly through the mandrel G, and a pi 11,315, is secured by a screw-threaded connection to the end of the said shaft` 1B, said pin extending beyond the Aface ot' the smaller end of the mandrel C, so as to enter the passage C2 of the mandrel C', and act upon the sliding block M3 in the manner above described. To admit of adjustment of the pin "M5, the latter is provided with flat faces m" for the application of a wrench. The gripping device in the construction described being operated entirely by the endwise movement of the mandrel, it is entirely obvious that the wire will be gripped the moment the mandrels are brought together in position for operation and bet'ore the rotation of the said mandrels begins. 'hen the mandrels are approaching each other, the jaws ot" the gripping device are open, the arm I and wire-guide at this time being in motion toward the larger end of the mandrel C', and the feed-rollers being engaged with the wire so as to feed the latter forward. The motions of the parts are so adjusted that the end of the wire reaches a point opposite the gripping-j aws, and the wire ceases its forward motion shortly before the mandrels come together. Thejaws are thus caused to pass on either side of the wire just before the gripping-jaws are closed by the action of the pin M, so that the wire is tirmly gripped when the mandrels are brought into contact with each other and are in readiness to begin their forward movement.

For the purpose of automatically severing from the main part of the wire the wire which has been wrapped about the mandrels to form the spring, an automatic cutting device is provided, which is constructed as follows:

N N are the two jaws ot' the cutting device, the same being located horizontally opposite the larger end of the mandrel C and in a line between the groove c in its part adjacent to the larger end ot' the mandrel and the wire-guide li when the latter is in position adjacent to the said larger end of the mandrel C. The jaws N N are thus located in such position that as the wire-guide moves horizontally toward the larger end ot' the mandrel C the wire will be carried between the said jaws and into position for the operation ot the latter thereon at the moment the winding is completed.

N is the stationary jaw ot' the cutting device, which jaw in the instance illustrated is rigidly attached toa `flat metal arm or bracket, N2, ol L shapelin form, and attached at both ends to the arched trame-plate A. The movable jaw N is attached to the end of a horizontal lever, N, which pivoted at a to the arm N2. To the opposite end et said lever N is attached a connecting-rod, nf, the lower end o'if which pivoted to a swinging dog, N4, Figs. 2 and lt), said dog beingl pivoted upon a stud, fai?, attached to the frame-plate A. Said dog Nl is located adjacent tothe periphery ot' the gear-wheel G, with the free end of the said dog extending over the outeriace ot' the wheel and in position to engage a pin, N5, attached to the said gear-wheel. Said dog NA1 is so located, as shown in Fig. 2, that in the revolution of the wheel the pin N5 will encounter the lower surface of the dog, and thereby lift its free end, with the effect of elevating the outer end of the lever hl3 and depressing the inner end of said lever, to which the movable cutter N is attached. Movement is given to the lever N in a reverse direction for separating the cutting-jaws by means et a coiled spring, N, connected to the said lever N and to the machine-irame above the same, as clearly shown in Fig. 5. rlhe pin is located upon the wheel G in such position as to strike the dog N4 and actuate the knife at the nioment, or shortly after, the mandrel C has completed its rotation.

The pins b3 ZJ* upon the plate B, which is mounted upon the shaft l) adjacent to the large end of the mandrel C, in the manner hereinbetore described, operate to prevent the end of the wire, suddenly freed by the action of the cutting devices, in the manner described, from springing outwardly to an inconvenient or dangerous extent. Said plate B" is cutaway or notched opposite the eutting-jaws, in the manner clearly shown in Fig. 4, to give room for said jaws.

For the purpose of accomplishing the discharge of the finished spring at one side ol the machine, as said sprin are dropped from the mandrels C C in the separat-ion ot' the latter, devices are provided, as follows:

is a horizontal shatt, supported at its ends in the trameplates A A, beneath and parallel with. the mandrels shafts B and B. Upon said shaft O, beneath the mandrels C and C, is located a disk, O', adapted to turn upon the shaft and provided with three arms or wings, O2 O2 O2, made of such width as to receive and hold a spring dropped upon and between them from the mandrels. The disk O is provided with three ratchet-teeth or notches, o o o. Oi" is a gearwheel mounted. upon the shat't adjacent to the disk O', and provided with a radial arm, O", which carries IOO IIO

at its end a spring-pawl, o', adapted to engage the notches 0 o 0. Intermeshing with the gearwheel O3 is a gear segment, O5, mounted upon the end of an oscillating arm, O, which is mounted upon a rock-shaft, O7, having bearings at its ends in the frame-plates A A of the machine. The arm O6 extends over and adjacent to the main shaftD of the machine, and said shaft is provided with a cam or wiper, o2, arranged to act upon au anti-friction roller, o3, which turns upon a pin or stud, 0*, in the said arm O6. The said cam 02 is arranged to move or swing the arm O6 upwardly once at each revolution of the shaft D, to thereby give a partial rotation to the gear-wheel At each partial revolution of the said gear-wheel the pawl o', which is engaged with one of the notches 0 of the disk O', is turned through a third of a revolution, and the said disk and arms O2 O2 are thereby revolved through the same distance. Inasmuch as the shaft D makes one revolution during the making of each spring, the said arms O2 O2 are advanced to carry forward and discharge from the machine each spring as the same is completed and dropped from the mandrels. The free rotation of the disk O upon the shaft O is prevented by means of a leather washer, 05, placed between the hub of the disk and a collar, o6, attached to the shaft.

As far as the main features of my invention are concerned, it is obvious that the same may be carried out by the employment of details made otherwise `than in the particular manner shown, and my invention is not, therefore, limited to such details of construction, except as the same are specifically herein claimed.

I claim as my inventionl. A machine for making conical wire springs, comprising two rotating conical mandrels arranged end to end, and which are .movable longitudinally toward and from each other, and a wire-guide which is movable in a direction longitudinally of the mandrels, substantially as described.

2. A machine vfor making conical wire springs, comprising two rotating conical mandrels located end to end, with their smaller ends together, and an oscillating wire-guide moving in an arc approximately correspon ding with the form or outline of one side of the mandrels, substantially as described.k

3. The combination, with two conical mandrels placed end to end, of means for giving intermittent rotary motion to said mandrels,

' means for giving reciprocatory motion to said mandrels toward and from each other, and a wire-guide movable in a direction longitudinally of the mandrels, substantially as described. 4. The combination, with two conical mandrels arranged end to end, of two shafts supportingA said mandrels, said shafts being mounted in bearings affording both longitudinal and rotary motion therein, means for giving intermittent rotary motion to said shafts, means giving intermittent endwise reciprocatory motion to said shafts, and a wire-guide movable endwise with relation to the mandrels, substantially as described.

5. The combination, with two conical mandrels arranged end to end, of two shafts supporting the same, said shafts being mounted in bearings affording both endwise and rotary motion of the shafts, said shafts being pro-. vided with longitudinal grooves, of rotating sleeves surrounding said shafts and provided with feathers engaging said grooves in the shafts, driving connections engaging said sleeves an d giving intermittent rotary motion thereto, levers arranged transversely with relation to the shafts and engaged at their ends therewith, a shaft provided with two cams acting' upon said levers to give endwise motion to the shafts, and a wire-guide movable endwise with relation to the mandrels, substantially as described.,

6. The combination, with the rotating and longitudinally-movable conical mandrels arranged end to end, of a wire-guide movable longitudinally with reference to the mandrels. a wire-gripper on one of said mandrelsand an intermittingly-acting wirefeeding device connected to and moving with said wire-guide, substantially as described.

7. The combination, with two rotating and longitudinally-movable conical mandrels arranged end to end, of a wire-guide movable longitudinally with reference to the mandrels, a wire-gripper on one of said mandrels, an intemittingly-acting wire-feeding device connected to and moving with said wire-guide, and a tension device, also connected and moving with the wire-guide, substantially as described.

8. rlhe combination, with two revolving and longitudinally reciprocating mandrels arranged end to end, of a wire-gripper upon one of said mandrels, a wire-guide movable longitudinally with relation to saidv mandrels, an intermittingly-acting feeding device movable with said wire-guide and engaging the wire passing through the same, and a cutting device arranged in alignment with the said wireguide when the latter is at the limit of its movement away from the wire-gripper, substantially as described.

9. The combination, with two rotating and longitudinally reciprocating conical mandrels, of a wire-guide movable longitudinally with relation to the mandrels, a wire-gripper upon one of said mandrels, an oscillating arm carrying said wireguide, a feeding device mounted upon said arm, and a cutting device arranged opposite the larger end of the other of said mandrels, substantially as described.

10. The combination, with two longitudinally-reciprocating revolving conical mandrels arranged end to end, of an oscillating wire-guide, a pivotally-supported arm carry- IOO IIO

ing said wire-guide, and means :tor giving oscillatory movement to said pivoted arm, substantially as described.

ll. rlhe eoinbimttion, with two rotating and longitudinallyreciprocating conical mandrels, ol a wire-guide, a pivotally-supported oscillating arm carrying said guide, feedingrollers mounted upon said arm and engaging the wire passing through the guide, a wiregripper upon one of said conical mand reis, and means giving intermittent rotary motion to said feed-rollers constructed to turn the rollers as the wireguide approaches said wire gripper, substantially as described.

l2. The combination, with two revolving longitudinally-recip recati ng conical mand rels arranged end to end, of a wire-gn ide movable longitudinally with relation to the mandrels, a pivotally-si'ipported swiiiging arm carrying a rigid arm extending outwardly from the said wire-guide-carrying arm, a rotatiiig cam, a lever engaging said cam, and a coniiecting-rod connecting said lever with the said arm of the wire-guide-carrying arm, substantially as described.

13. The combination, with two rotating and longitudinally-recip rocating conical man d rels arranged end to end, of a wire-guide, a pivotallysupported oscillating arm carrying said guide, feed -rollers mounted upon said arm, one of said feed-rollers being movable toward and from the other feed-roller, means giving intermittent rotary movement to said feedrollers, and means for moving one ot said rollers toward and from the other roller, subst-arr tially as described.

14. The combination, with two rotatingand longitudinally-reciprocatingconical mandrels arranged end to end, of a wire-guide, a pivotally-supported oscillating arm carrying said wire-guide, feed-rollers mounted upon said oscillating arm, and means for giving intermittent rotary movement to said feedro1lers, comprising a shat't, K, connected with one of said feedi'olleis, gearing connecting said shaft K with the other 'feed-roller, a shaft, K5, arranged concentrieall y with relation to the pivotal axis of the said oscillating arm, gearing connecting said shafts K and K5, an oscillating arm, K5, a pawl-and-ratchet connection between said arm K5 and the sha t't Ki", and means for giving intermittent oscillatory movement to said arm K5, substantially as described.

` l5. The conibinatiomwith the rotating' and longitudinally-rcciprocating conical mandrels (l and C', of a wire-guide, a pivotally-sup ported arm carrying said wireguide, `feedrollers mounted upon said arm, a shaft, K, mounted upon said arm and giving motion to said feed-rollers, a shaft, K, arranged concentric with the pivotal axis of the said arm, gear ing connecting said shafts K and K5, an oscillating arm, K5, mounted eoncentrically with the shaft K5, a pawl-and-ratchet connection between said oscillating arm K5 and the shaft K5, a lever, K, connected with the said oscillating arm K5, a spring applied to said lever K t'or movingI the latter in one direction, and a drivearheel, Gf, by which rotary motion is given to one of said mandrels, said wheel being provided with a cam, K5, which engages and actuates the said lever K, substz'intially as diiescribed.

lli. The combination, with the oscillating arm I and feed-rollers 7i: 7n', et shat'ts K K', supporting said li'eed-rellers, an eccentricplug, K2, supporting the shaft K, an arm, L, attached to the said eccentric-Igilug K2, togglearms L L?, coi'lnected with said arm L and with the arm l, and stops or detents L4 L5, en gaging and moving said toggle-arms as the said arm l is oscillated, substantially as described.

17. The combination, with the mandrels C C', an oscillating arm, I, and a wire-gnide mounted thereon, of intermittingly-rotating feed-rollers mounted upon said oscillating arm l, shafts K and K', supporting said 'l'ee l rollers, an eccentric-plug, K2, mounted in the arm and aiiording bearing for the shaft K', an arm, L, upon said eccentric-plug, togglearms L L2, connected with the arm I and with the said arm L, a spring, L, acting to hold said toggle-arms in their flexed position, a spring-difatent, L", engaging one of. said toggle-arms for flexing the same, and an arm, L5, attached to the aetuatiiig-lever F and acting upon said toggle-arms to straighten out the latter, substantially as described.

1S. The combination, with two rotating longitudii1ally-reeiprocatin g conical mandrels arranged end to end, oil a wire-grip] )eron one ot' said mandrels, comprising astationary jaw and a movable jaw, said movable jaw being attached to a sliding bar mounted'in the man drel and constructed t'or actuation by the endwise pressure ot the other mandrel when said mandrels are brought together, substantially as described.

li). The combination, with two revolving an d lon git u din ally-reciprocatin g conical mandrels arraiiged end to end, and a wire-guide movable endwise with relation to the mandrels, ol? stationary guard pins or fingers b5 b5, surrounding the end of one of the mandrels, substantially as described.

20. The combination, with two rotating longitndiiilally -reciprocating coni ral mandrels arranged end to end, and a wire-guide movable longitudinally with relation to the mandrels, oi' means for discharging finished spril'igs, consisting of a plurality of revolving arms located beneath the said mandrels, and means giving intermittent rotary motion to said arn'is, sulistantially as described.

2l. 'lhe combination, with rotating and longitudinallyanovable conical mandrels arranged end to end, and a wire-guide movable longitudinally with relation to said mandrels, of a nire-cutting device embracing stationary and movable cutters arranged in alignment with the \\'i,re-guide when the latter IOO IIC

at the extreme limit of JLhe forward movement, a pivoted lever supporting said movable cutter, a pivoted dog, N4, Connected with said lever, and a Wheel carrying a pin, N5, constructed to engage said dog for actuating the movable Cutter, substantially as described.

In testimony that I claim the foregoing as my invention I afx my signature in presence of two Witnesses. CHRISTIAN C. HILL. Witnesses C. CLARENCE POOLE, E BJELLIASA 

